<template>
<div class="star" :class="starType">
    <span
            v-for="(itemClass,index) in itemClasses"
            :class="itemClass"
            :key="index"
            class="star-item"
    ></span>
</div>
</template>

<script type="text/ecmascript-6">
    const LENGTH=5
    const CLS_ON='on'
    const CLS_HALF='half'
    const CLS_OFF='off'

    export default {
        props:{
            size:{
                type:Number
            },
            score:{
                type:Number
            }
        },
        computed:{
            starType(){
                return 'star-'+this.size
            },
            itemClasses(){
                let result=[
                ]
                let score=Math.floor(this.score*2)/2
                let hasDecimal=score%1!==0
                let integer=Math.floor(score)
                for(let i=0;i<integer;i++){
                    result.push(CLS_ON)
                }
                if(hasDecimal){
                    result.push(CLS_HALF)
                }
                while (result.length<LENGTH){
                    result.push(CLS_OFF)
                }
                return result
            }
        }
    }
</script>

<style lang="stylus" rel="stylesheet/stylus">
    @import "../../../common/stylus/mixin.styl"

    .star
        font-size 0
        .star-item
            display inline-block
            background-repeat no-repeat
        &.star-48
            .star-item
                width 20px
                height 20px
                margin-right 22px
                background-size 20px 20px
                &:last-child
                    margin-right 0
                &.on
                    bg-image('star48_on')
                &.half
                    bg-image('star48_half')
                &.off
                    bg-image('star48_off')
        &.star-36
            .star-item
                width 15px
                height 15px
                margin-right 6px
                background-size 15px 15px
                &:last-child
                    margin-right 0
                &.on
                    bg-image('star36_on')
                &.half
                    bg-image('star36_half')
                &.off
                    bg-image('star36_off')
        &.star-24
            .star-item
                width 10px
                height 10px
                margin-right 3px
                background-size 10px 10px
                &:last-child
                    margin-right 0
                &.on
                    bg-image('star24_on')
                &.half
                    bg-image('star24_half')
                &.off
                    bg-image('star24_off')
</style>
